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Metal-ion-tuned metal-organic frameworks for C2H2/CO2separation
- Source :
- Chinese Journal of Structural Chemistry; 20230101, Issue: Preprints
- Publication Year :
- 2023
-
Abstract
- Adsorptive separation of acetylene (C2H2) from carbon dioxide (CO2) by adsorption is a viable method for producing high-purity C2H2required for industrial applications. However, separating C2H2and CO2is challenging due to their extremely similar molecular sizes and physical properties. Metal-Organic Frameworks (MOFs), as a novel porous material with high specific surface area and tunable pore size, have shown great potential in the separation and purification of light hydrocarbons. Herein, we synthesized three isoreticular Al-MOFs (Al-TCPP, Al-TCPP(Co), and Al-TCPP(Fe)) by modulating metal ions at the porphyrin center, all of which can effectively separate C2H2/CO2. The addition of metal ions can regulate and improve the separation selectivity of C2H2/CO2. Compared with the parent Al-TCPP, the IAST selectivities of Al-TCPP(Co) and Al-TCPP(Fe) for equimolar C2H2/CO2increased from 1.73 to 3.66 and 4.43, respectively. Breakthrough experiments validate their efficient separation of C2H2/CO2. Furthermore, they all exhibit excellent hydrothermal stability, laying the foundation for practical applications.
Details
- Language :
- English
- ISSN :
- 02545861
- Issue :
- Preprints
- Database :
- Supplemental Index
- Journal :
- Chinese Journal of Structural Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs63736466
- Full Text :
- https://doi.org/10.1016/j.cjsc.2023.100146